Louise graissot



cation.

UNITED STATES ATENT Trice.

LOUISE GRAISSOT, OF LYONS, FRANCE, ASSIGNOR TO GILLET FILS, OF

SAME PLACE.

DRESSING SILK.

SPECIFICATION forming part of Letters Patent No. 371,498, dated October 11, 1887.

Application filed May 24, 1887. Serial No. 239,218.

(No specimens.) Patented in France January 22, 1887, No. 181,030, and in England April '7, 1887, No. 5,205.

To all whom, it may concern:

Be it known that I, LOUISE GRAISSOT, spinster, a citizen'of the Republic of France, and a resident of Lyons, France, have invented new and useful Improvements Relating to the Treatment ofFabricsOomposed ofor Containing Silk for Improving the Appearance of the Same, (for which I have obtained a patent in France, dated January 22, 1887, No. 181,030, and for which I have applied for provisional protec tion in Great Britain, No. 5,205, dated April 7, 1887,) of which the following is a specifi- This invention relates to an improved process of treating fabrics composed of silk only, or of silk combined with cotton or wool, for the purpose of producing upon the said fabrics certain effects of shrinkage, and thereby giving to these fabrics an entirely new appearance.

According to the nature of the fabrics to I which this treatment is applied, and also according to modifications in the process, which will hereinafter be described, these effects of shrinkage are produced either in a plain form with convex effects or with fleecy effects, longitudinally folded and craped.

This process is applicable to any varieties of silk fabric, and especially to fabrics designed for crapes, English crape imitations, silk handkerchiefs, comforters, and the like, and particularly to fabrics designed for goffcring. It; is, moreover, applicable not only to pure silk fabrics, but also to mixed fabrics, such as cotton and silk, wool and silk, the cotton and the wool not being affected.

This process is carried into practice in the following manner. A cold bath is prepared, which is formed of chloride of zinc or other Zinc salts and water, the strength varying, according to the nature of the fabrics that are to be treated, from 20 to 40 Baum, weak baths being adapted for light fabrics and strong baths for reduced fabrics. The fabrics are then immersed in this bath, and left therein for from an hour to an hour and a half if they are reduced fabrics, and for only from half an hour to threequarters of an hour if they are light fabrics. During any one of these periods care must be taken to renew the surfaces of contact of the fabric with the bath.

At the expiration of the aforesaid periods the fabric is removed from the bath, dried, and carried to a tepid chamber, the temperature of which varies between 25 and 80 centigrade. The fabric is left in this chamber for a variable time, which is determined by touch and observation of the progress of the sh rinkage and craping which are gradually produced. WVhen this effect is obtained to the desired degree, the fabric is removed, and then treated for about a quarter of an hour in a solution of cold carbonate of potash at 10 Baum. It is then dried, washed in flowing water, dried again, and finally boiled with soap. The boiling with soap can also be effected immediately after the fabric is removed from the hot chamber, the bath of carbonate of potash being thus dispensed with. The fabric is after this subjected to the ordinary operations of the industry. For these various operations the apparatus usually employed in the silk industry for operations of this kind is used.

\Vhat I claim is- 1. The method herein described of producing the effect of shrinkage on fabrics containing silk, which consists in subjecting the fabric to the action of a bath of zinc salt, then removing and drying the fabric in a tepid chamber, substantially as set forth.

2. The method herein described of producing the effect of shrinkage on fabrics containing silk, which consists in subjecting the fabric t0 the action of a bath of zinc salt, removing and drying the fabric, placing the same in a tepid chamber to develop the shrinkage, and subsequently boiling the fabric with soap, substantially as described.

3. The method herein described of producing the effect of shrinkage on fabrics containing silk, which consists in subjecting the fabric to the action of a chloride-of-zinc bath, then removing and drying the fabric and placing the same in a tepid chamber, and subsequently subjecting the said fabric to the action of a solution of carbonate of potash, substantially as set forth.

LOUISE GRAISSOT.

\Vitnesses:

GEORGES FREYDIER-DUBREUL, XAVIA J ANIOOT. 

